[barefeg]

We started with something like this as well. The problem is that the savings and disposable income will also be proportional. If the difference in salaries is large then it could seem unfair. But then again it depends whether you view wealth as an individual or shared affair.

[tangent87]

We do have pretty different incomes and working hours. Wealth is absolutelly a shared affair, but we could not get to agree on how to invest the savings. We have pretty different risk tolerance and asset class affinity, so we decided to split proportionally and grant each other freedom with whatever is not necessary for the family needs. Most likely we'll re-evalute the criteria in the future if absolute value of our savings diverge too much or if our investing choices will have markedly different ROIs.